High efficiency electric vehicles demand efficient AC-DC inverters operating at high voltages and temperatures reaching 150°C. SABIC’s ELCRES™ HTV150A High temperature capacitor films having reduced dissipation losses at 150°C have been developed for high voltage inverter applications. Capacitors made with 3µm and 5µm films pass 2000 hours of life-testing at 150°C and applied voltage of 500 and 900V respectively. Capacitance changes, dielectric losses, and insulation resistance remained within acceptable limits over the 2000-hour test duration. Additional damp heat reliability testing at 85°C and 85% Relative Humidity showed little or no change in capacitance, losses, and insulation resistance over 1000 hours of aging. HTV150A films have a unique feature of reduced dissipation losses as operating temperature and frequency increase, offering the designer an opportunity to reduce heat generation in the capacitors and lead to overall efficiency gain in the inverter module.
